Thread-forming apparatus



J. P. HOOPER THREAD FORMING APPARATUS july 8 1924.

Filed Feb. 23. 1922 ?atentati July 8 %2435 P. HOOPER, OF RUX'I'ON, MAR'YLAND, ASSIGNOB TO J mu FACTURING' COANY, OF BALTE/LOKE, MYIAND, A CORPORATION OF MAR Application m& February 23, 1922. Serial No. 538,'735.

To all whom it may ooncem:

Be it known that JAMES P. Hoornn, a citizen of the United States, residing at Ruxton, in the county of Baltimore and State of Maryland, has invented certain new and useful Improvements in Thread- Forming Apparatus, of which the following is a specification.

This invention relates to an improved apparatus for i producing artificial 'silk i threads from viscose or equivalent substances.

The object of the invention is to provide an improved structure for producing threads by centrifugally-throwing a thread-forming solution.

One form of structure embodying the invention is illustrated in the accompanying v drawing, wherein,-

Fig. 1 shows the structure in verticalsection, and

Fig. 2 illustrates the detached spinneret in top or plan view.

Referrng to the drawing the numeral 5 designates a supporting structure in which a hearing 6 is sustained and a vertical e spindle 7 extends through said hearing. The spindle is tubular in form and has a central passage 8 and a pulley or equivalent device 9 is attached to the spindle whereby to rotate the same.

To the lower end of the spindle I attach a head 10 which latter, in this instance, has a central passage 11 extending u wardly from the lower side of the head whch passage communicates or is in register with the passage 8 of the spindle.

The head 10, in the present instance, s circular in form with its point of greatest diameter 12, located in a plane crossng the axis at a point between the two ends of the headassage 11'. In other words, if the spindle g is vertically located and the head 10 is mounted thereon so as to revolve in a horizontal lane, the point of greatest diameter 12 of t e head is located slightly above the lowermost discharge-end of the central passage 11.

It has been found in practice that the head 10 may be revolved in either a horizontal or a vertical plane and' also that instead of the head being on the lower end of the spindle the entire structure may be reversed so the head will becarried at the upper end of the spindle.

Because of these several positions in which the head may be operated with good results, without a change of form or the relation of the parts except to reverse them or place them on their sides, I 'have found t necessary to adopt ex ressions which will distinguish one side o the head from the other, because the expression lower and upper sides will not sufiice.

With this in view, I shall therefore call the side or surface 13, of the head the outer side while the opposte side or surface 14: wil be termed the inner side of said head.

The point 12 therefore of greatest diameter of the head is located in a plane between the outer and inner sides or surfaces of the head, and the outer side or surface 13, of the head is convex in that it curves `backwardly from the outlet end of the cenprovide the head with a series of radiallyprojecting needles 16 which are rigidly attached to and revolve or travel in a circular path as the spindle andhead revolve together.

Around the spindle, the head and the radially-projecting needles I provide a shell 17 which has a circular wall 18. This wall extends ast the head from the inner to the outer 'si e of the latter and terminates at a point beyond the said outer side of the head.- The inner circumference of this circular wall 18 is spaced from the outer ends of the needles, for a purpose which will also be presently explained.

A distributo'r-chamber 19 is provided at or adjacent to the inner end of the shell 17 and a supply-pipe 20 enters said distributor-chamber for the purpose of continuously supplying a setting solution to that chamber. The supply of setting solution may be forced or not as desired.

Between the head 10 and the distributorchamber 19 I provide a baEle- 21. This baffie is therefore located at the inner side of the head.

In the present instance this bame has the form of a disk whose inner side 22, confronts the distributor-chamber and whose rim 23 is curved outwardly toward the inner circumference of the shell-wall 18 but is spaced from the latter.

Tn the present instance the battle is shown as carried on the spindle 7 so as to revolve therewith hut this is not essential.

A tube 24 Supplies a viscose or equivalent solution to the passage 8 of the spindle.

The operation of the structure is substantially as follows:

Viscose, or equivalent solution, is supplied to the passage 8 of the spindle and passed through the latter to the passage 11 of the rapidly-revolving head 10. The centrifugal force set up by this rotation and the character of the viscose solution is such that as it leaves the end of the head-passage it will follow the contour or curved outer side 'or surface 13 of the head and flow to the annular edge or point of greatest diameter 12 of the head. At this point the rotary motion of the head causes the viscose solution to drag along the edge of the head between the needles until it reaches the front side of the needles and the centrifugal action then causes the solution to flow outwardly along the needles 16 which in practice are of a very small gage and be ejected `pinges against the inner side 22 of the rotating baflle which imparts a Whirling action to the solution and causes it to flow 'along the shell-wall in a comparatively thin annular stream. The baflle also prevents the settingsolution from direct* contact with the needles or the inner side 14 of the head where its deposit would cause a setting of the thread-forming solution.

The wall of setting solution is indicated by the broken lines 26 at the inner side of the shell and by reference to Fig. l. It will be noted that a gap 25 is left between the ends of the needles and the wall of setting solution. i

eonaaa This gap is provided so as to prevent the setting solution from contacting with the thread-forming solution while the latter is in the needle-ends which causes the ejected strands to leave the needles in short lengths Whereas if the gap is maintained long threads will be formed.

As the threads extend across the gap 25, and enter the setting solution their speed of rotation is slowed 'down and an elongation and stretch of the thread follows as well as a twisting together of the numerous threads they are led oli from the shell.

Having described my invention, T claim,"

1. A mechanism for forming threads including a rotating head, a series of needles moving with the head and means for fiowing a thread-forming solution over an exterior surface of the head to feed the same to the I needles.

2. A mechanism for forming threads including a head having a series of needles projecting therefrom, means for conveying a thread-forming solution over the exterior of the head to feed the same to the needles and means for rotating the head to centrifugally throw the solution from the needles in the form of threads.

3. A mechanism for forming threads including a rotary head having a solid body- 'part with a series of needles about and radiating from said solid bod -part and means for supplying a threadorming solution to the needles to be thrown therefrom in the form of threads.

4. A mechanism for forming threads ineluding a rotary head having a solid bodypartwith a series of needles about and radiating from said solid body-part and means for fiowing a thread-forming solution over an exterior surface of the head to feed the same to the needles.

5. A mechanism for forming threads including a head, a series ofneedles radiating from a solid chamberless portion of said head, means for feeding a thread-forming solution over an exterior surface of the head to feed the same to the needles and means for rotating the head to centrifugally throw the solution from the ends of the needles.

6. A mechanism for forming threads including a chamberless head with a passage to feed a thread-forming solution to the exterior. of the head, a series of needles ra'- diating from the said head and out of communication with the said passage,--said needles collecting the solution from the exterior of the head and means for revolving the head to move the needles in a circular path and thereby centrifugally eject the solution in the form of threads.

7. A mechanism for forming threads including a head having an enlargement around its exterior, a series of needles radiat- I ing from d s. g 8. A mechanism for forming threads includin a a head having 'a passage' therethroug and having a crcumference that is only accessible from the said assagfi h o the ea traversing an exterior surface a seres of needles about the cromference' of the head, means for supplying. a threadforming solution to said passage and means for revolving the head to -cause said solu-.

tion to flow along the the head to said needles.

9. A mechanismfor forming threads in cluding a a head attached to said spindle and having a passage extending therethrough from the ndle passage to an exterior surface of s the head, a series of needles carried by the head no porton of said needles being exosed to either of said pas sa es means for eeding a thread-formng so uton to said passages, and means for' revolving the spin- 'exterior surface of spindle having a passage thei-ein,

of the passage to the enlargement and the enlargement dle and head to cause-the solution to traverse tlle exterior surface 'ofthe head to the nee- 10. The combination with a hollow spindle, of a' head havin an exterior circular enlargement said hea also having a central passage and opening in a plane beyond said enlargement, a series of needles about said enlargement and means for revolving the head and needles.

11. A head for a th read-forming mechanism comprising :a -body having a central passage, a convex su ace at the dischargesideof said passage and a series of needles about the head at'the edge of the convex surface. e f 12. A' head-`for` a thread-forming mechanism comprising a body having a central passage and an exterior enlargement' extending about and\ out of communication .with the passage said head having an exterior surface that extends from the outlet end periphery of the said a: seres of needles around and radiating from said head. v

In testimony whereof I aflix y si S. P.` OO

J ER.

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